Final answer:
The annual interest rate for the $150,000 loan is 9.6% (option C).
Step-by-step explanation:
To determine the annual interest rate for the $150,000 loan with monthly interest-only payments of $1,000, we can use the formula:
Annual interest rate = (Monthly payment / Principal loan amount) * 12 * 100%
Plugging in the values, we get:
Annual interest rate = (1000 / 150000) * 12 * 100% = 0.8% * 12 * 100% = 9.6%
Therefore, the correct answer is 9.6% (option C).